CORSHAM surged from behind to book their place in the Dorset & Wilts Vase quarter-finals.
They lost tighthead Ed Minty with an ankle injury in the first half, and wing Tom Sandell with a leg injury in the second period, while fly-half Rory Auld and flanker Andy Redgwell also sustained knocks in what was a bruising and uncompromising contest.
Blandford scored on the half-hour with a try from full-back Mark Beckett, converted by hooker Lee Robbins.
The home side responded with a try from second row Rob Turner his second in successive outings and that left Blandford with a slender 7-5 lead at the break.
Corsham eventually went in front midway through the second half with a try from blindside Rob Snape-Johnson.
They gave themselves some breathing space with a second try from Snape-Johnson.
They face Bradford on Avon in the quarter-final on February 7.
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